I have never tried this before, but we'll see if it works out!     NOTE:  Have sold 1 set of 3 cars, as reflected in the photos.  4 left.  Ignore the 'eBay count'.

I have 15 automobile kits and my idea is to sell them in groups of 3.  Each 3 is the same price, $22.50, plus the shipping charge.  You can buy the cars already in a group, or you can pick any 3 autos from these groups.  As these cars sell, I will modify the posting to remove those that are gone.  If one person wants to buy all the cars, he can and the sale is removed.  If he wants 2, 3 or 4 groups, that is fine as well.

The groups all contain identical cars or cars in the same category.  Like 1 group is 3 identical Fords, the others have similar Pick-up trucks or even a group of 3 school buses.  Your choice is to keep an existing group or make a group of your own-- and I will modify the post to reflect whatever is left.  I am going to list this as a group of 5 items for sale and if you buy more than a single group, I will modify the shipping charge to reflect the sale as being shipped in a single container.

The key to this is you need to send me a message (Contact Seller) listing cars you want.  When you make the purchase I can modify the images remaining in the post.

I will definitely answer questions about this, in eBay messages.